RequestFilters CacheClient

[quaffapint]

In App_Start under the Configure function I added a this.RequestFilters.Add((req, res, dto) piece for authorization check.

I look up some data in the database and want to cache it to prevent constant lookups.  What I can't seem to figure out is how to use ICacheClient inside the App_Start file.  It always never inits and I get an error. It works fine in other classes outside of App_Start.  I'm calling it after the line...

container.Register<ICacheClient>(new MemoryCacheClient());

Where/How do I define public ICacheClient CacheClient { get; set; } in App_Start so I can cache my lookup in the RequestFilter?

Thanks very much.

[Demis Bellot]

Hi, 

Yeah the container is not passed in so you'll have to reference the container from elsewhere either via a closure:

container.Register<ICacheClient>(new MemoryCacheClient());
...
this.RequestFilters.Add((req, res, dto) => {
    var cacheClient = container.Resolve<ICacheClient>();
});

Or via the singleton

this.RequestFilters.Add((req, res, dto) => {
    var cacheClient = AppHostBase.Instance.Container.Resolve<ICacheClient>();
});

Not pretty, but it saves the extra argument in the Request Filters signature.

Although if there's interest? I may make the Container available off the request so you could do something like:

this.RequestFilters.Add((req, res, dto) => {
    var cacheClient = req.TryResolve<ICacheClient>();
});

Cheers,

--
- Demis

http://twitter.com/demisbellot

http://www.servicestack.net/mythz_blog

[Aaron Fischer]

Could the request filter fill it's self from the container with anything implementing IRequestFilter?  This way the container could handle all dependencies.  Otherwise what is your recommendation for unit testing request filters?

[Demis Bellot]

Note: I've since added the Container to the IHttpRequest so it's available on all filters as well, so this now works:

this.RequestFilters.Add((req, res, dto) => {
    var cacheClient = req.TryResolve<ICacheClient>();
});

Cheers,

On Tue, Jun 12, 2012 at 6:05 PM, Aaron Fischer <pretze...@gmail.com> wrote:

Could the request filter fill it's self from the container with anything implementing IRequestFilter?  This way the container could handle all dependencies.  Otherwise what is your recommendation for unit testing request filters?